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Advisor(s)
Abstract(s)
We investigate the scenario of resonant thermal leptogenesis, in which the leptonic asymmetries are generated through renormalization group corrections induced at the leptogenesis scale. In the framework of the standard model extended by three heavy Majorana neutrinos with masses M(1) = M(2) << M(3) at some high scale, we show that the mass splitting and CP-violating effects induced by renormalization group corrections can lead to values of the CP asymmetries large enough for a successful leptogenesis. In this scenario, the low-energy neutrino oscillation data can also be easily accommodated. The possibility of having an underlying symmetry behind the degeneracy in the right-handed neutrino mass spectrum is also discussed. (c) 2005 Elsevier B.V. All rights reserved.
Description
Keywords
Neutrino Mass Matrix Lepton-Flavor Violation CP Violation See-saw Models Baryogenesis Symmetry Democracy Angles
Citation
BRANCO, G. C.; FELIPE, R. G.; JOAQUIM, F. R.; NOBRE, B. M. - Enlarging the window for radiative leptogenesis. Physics Letters B. ISSN 0370-2693. Vol. 633, nr. 2-3 (2006), p. 336.344.